STIEBEL ELTRON HM Operation Instruction

OPERATION AND INSTALLATION

Hydraulic module for heat pumps

» HM

» HM Trend

» HMS

» HMS Trend

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CONTENTS | SPECIAL INFORMATION

SPECIAL INFORMATION

OPERATION

1. General information ��3

1.1 Relevant documents_____________________________________________ 3

1.2 Safety instructions _______________________________________________ 3

1.3 Other symbols in this documentation _______________________ 3

1.4 Units of measurement __________________________________________ 3

2. Safety �� 3

2.1 Intended use ______________________________________________________ 3

2.2 General safety instructions ____________________________________ 3

2.3 Test symbols ______________________________________________________ 4

3. Appliance compatibility ��4

4. Appliance description ��4

4.1 WPM heat pump manager _____________________________________ 4

5. Maintenance and care ��4

6. Troubleshooting ��4

INSTALLATION

7. Safety �� 5

7.1 General safety instructions ____________________________________ 5

7.2 Instructions, standards and regulations ____________________ 5

8. Appliance description ��5

8.1 Standard delivery ________________________________________________ 5

8.2 Accessories ________________________________________________________ 5

9. Installation ��5

9.1 General information _____________________________________________ 5

9.2 Removing the appliance cap __________________________________ 5

9.3 Minimum clearances ____________________________________________ 6

9.4 Wall mounting ____________________________________________________ 6

9.5 Hydraulic connection ___________________________________________ 7

9.6 Filling the system ________________________________________________ 8

9.7 Venting the appliance ___________________________________________ 8

9.8 Safety valve _______________________________________________________ 9

10. Power supply ��9

10.1 Electric emergency/booster heater _________________________ 10

10.2 Control voltage __________________________________________________ 10

10.3 WPM heat pump manager ____________________________________ 11

10.4 Sensor installation ______________________________________________ 12

10.5 Connecting external components ___________________________ 13

10.6 Fitting the appliance cap ______________________________________13

11. Commissioning �� 14

11.1 Check before commissioning the heat pump manager _ 14

11.2 Appliance handover ____________________________________________ 14

12. Troubleshooting �� 15

12.1 Resetting the high limit safety cut-out _____________________ 15

13. Maintenance �� 15

14. Speciﬁcation �� 16

14.1 Dimensions and connections _________________________________ 16

14.2 Wiring diagram HM | HM Trend ______________________________ 18

14.3 Wiring diagram HMS | HMS Trend __________________________ 20

14.4 Data table ________________________________________________________ 22

GUARANTEE

ENVIRONMENT AND RECYCLING

SPECIAL INFORMATION

- The appliance may be used by children aged8

and older and persons with reduced physical,

sensory or mental capabilities or a lack of ex-

perience and know-how, provided that they are

supervised or they have been instructed on how

to use the appliance safely and have understood

the resulting risks. Children must never play with

the appliance. Children must never clean the ap-

pliance or perform user maintenance unless they

are supervised.

- The connection to the power supply must be in

the form of a permanent connection. Ensure the

appliance can be separated from the power sup-

ply by an isolator that disconnects all poles with

at least 3mm contact separation.

- In the event of damage to the power cable this

must always be replaced by a qualiﬁed contractor

authorised by the manufacturer, using original

spare parts.

- Fix the appliance in position as described in

chapter "Installation/ Preparations".

- Observe the minimum and maximum water

inlet pressure (see chapter "Speciﬁcation/ Data

table").

- We recommend regular inspection (to establish

the current condition of the system), and main-

tenance by a qualiﬁed contractor if required (to

return the system to its original condition).

OPERATION

General information

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OPERATION

1. General information

The chapters "Special Information" and "Operation" are intended

for both the user and qualiﬁed contractors.

The chapter "Installation" is intended for qualiﬁed contractors.

Note

Read these instructions carefully before using the appli-

ance and retain them for future reference.

Pass on the instructions to any new user where appro-

priate.

1.1 Relevant documents

 WPM operating instructions

 WPM commissioning instructions

 Operating and installation instructions for the connected

heat pump

 Operating and installation instructions for all other com-

ponents in the system

1.2 Safety instructions

1.2.1 Structure of safety instructions

!

KEYWORD Type of risk

Here, possible consequences are listed that may result

from failure to observe the safety instructions.

 Steps to prevent the risk are listed.

1.2.2 Symbols, type of risk

Symbol Type of risk

Injury

Electrocution

1.2.3 Keywords

KEYWORD Meaning

DANGER Failure to observe this information will result in serious

injury or death.

WARNING Failure to observe this information may result in serious

injury or death.

CAUTION Failure to observe this information may result in non-seri-

ous or minor injury.

1.3 Other symbols in this documentation

Note

General information is identiﬁed by the adjacent symbol.

 Read these texts carefully.

Symbol Meaning

Material losses

(appliance damage, consequential losses and environmen-

tal pollution)

Appliance disposal

 This symbol indicates that you have to do something. The ac-

tion you need to take is described step by step.

1.4 Units of measurement

Note

All measurements are given in mm unless stated oth-

erwise.

2. Safety

2.1 Intended use

Observe the operating limits listed in chapter "Speciﬁcation".

This appliance is intended for domestic use. It can be used safely

by untrained persons. The appliance can also be used in a non-do-

mestic environment, e.g. in a small business, as long as it is used

in the same way.

Any other use beyond that described shall be deemed inappropri-

ate. Observation of these instructions and of instructions for any

accessories used is also part of the correct use of this appliance.

2.2 General safety instructions

- The electrical installation and installation of the heating cir-

cuit must only be carried out by a recognised, qualiﬁed con-

tractor or by our customer support engineers.

- The qualiﬁed contractor is responsible for adherence to

all currently applicable regulations during installation and

commissioning.

- Operate the appliance only when fully installed and with all

safety equipment ﬁtted.

- Protect the appliance from dust and dirt ingress during

building work.

!

WARNING Injury

The appliance may be used by children aged 8 and older

and persons with reduced physical, sensory or mental

capabilities or a lack of experience and know-how, pro-

vided that they are supervised or they have been in-

structed on how to use the appliance safely and have

understood the resulting risks. Children must never play

with the appliance. Children must never clean the ap-

pliance or perform user maintenance unless they are

supervised.

!

OPERATION

Appliance compatibility

4 | HM (S)| HM(S) Trend www.stiebel-eltron.com

!

WARNING Injury

 For safety reasons, only operate the appliance with

the casing closed.

2.3 Test symbols

See type plate on the appliance.

3. Appliance compatibility

The appliance can be operated in conjunction with the following

air | water heat pumps:

- HPA-O 3-8 CS Plus

- HPA-O 7-13 (C)(S) Premium

- WPL 13/18 E, WPL 13/18 cool

- WPL 15-25 A(C)(S)

- WPL 33 HT(S)

- WPL 07-17 ACS classic

- WPL 19-24 I, A

4. Appliance description

The appliance is a hydraulic module for air/water heat pumps

installed outdoors and is installed by wall mounting inside the

thermal envelope of the building. Connection to the water side

of the appliance is from below. Connections are provided on the

appliance for the heat pump ﬂow, the heating system ﬂow and

for the heat exchanger for DHW heating. A further connection is

intended for the drain hose from the safety valve.

The following are integrated into the appliance: a diaphragm ex-

pansion vessel with 24litre capacity, a high efﬁciency [HE heating

circuit pump sized in line with heating output, an electric emer-

gency/booster heater and a WPM heat pump manager.

Particular feature of the HM(S) with ASL-HM

The ASL-HM connector block is equipped with additional connec-

tions for the heat pump return, the heating system return and the

return from the heat exchanger for DHW heating. In addition, the

connections are equipped with ball shut-off valves to facilitate

installation.

4.1 WPM heat pump manager

The heat pump manager is responsible for the processes that

control and regulate the heat pump.

5. Maintenance and care

!

Material losses

Maintenance work, such as checking the electrical safety,

must only be carried out by a qualiﬁed contractor.

A damp cloth is all you need to care for the plastic parts. Never

use abrasive or corrosive cleaning agents.

We recommend regular inspection (to establish the current con-

dition of the system), and maintenance by a qualiﬁed contractor

if required (to return the system to its original condition).

6. Troubleshooting

If you cannot remedy the fault, notify your qualiﬁed contractor.

To facilitate and speed up your enquiry, please provide the serial

number from the type plate. The type plate is located at the front

top, on the right or left hand side of the casing.

Sample type plate

Montageanweisung beachten! Dichtheit geprüft!

Made in Germany

*xxxxxxxxxxxxxxxxxx*

1

26_03_01_1570

1 Number on the type plate

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INSTALLATION

Safety

INSTALLATION

7. Safety

Only a qualiﬁed contractor should carry out installation, commis-

sioning, maintenance and repair of the appliance.

7.1 General safety instructions

We guarantee trouble-free function and operational reliability only

if original accessories and spare parts intended for the appliance

are used.

7.2 Instructions, standards and regulations

Note

Observe all applicable national and regional regulations

and instructions.

8. Appliance description

8.1 Standard delivery

The following are delivered with the appliance:

- 4 double ended screws with rawl plugs, washers and nuts

- 3TAF PT immersion/contact sensor

- 1 AFPT outside sensor

- Installation template

8.2 Accessories

- Connector block ASL-HM

9. Installation

9.1 General information

Note

We do not recommend installing the appliance in wet

rooms. Wet rooms include rooms used, for example, for

washing or drying clothes.

To protect the appliance against damage it should be transported

to the installation location in its original packaging.

Install the appliance in a suitable location close to the heat pump.

Ensure that the wall structure can bear the weight of the appliance

before securing the appliance to the wall.

The wall on which the appliance is to be mounted must be even.

Once mounted, the appliance cap must seal the appliance without

gaps.

 Use spacer discs to compensate for any unevenness.

!

Material losses

 Always ﬁt the appliance cap when interrupting in-

stallation work for any length of time.

9.2 Removing the appliance cap

HM(S) | HM(S) Trend

D0000041457

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INSTALLATION

Installation

ASL-HM

D0000041458

9.3 Minimum clearances

HM (S) | HM(S) Trend without ASL-HM

≥150

≥1000

≥70

≥400

D0000041600

 Maintain the minimum clearances to enable maintenance

work on the appliance.

If the appliance is not installed in a recess, we recommend

leaving 400mm clearance on the right-hand side for the

electrical connection.

HM(S) | HM(S) Trend with ASL-HM

≥150

≥1000

≥400

≥70

D0000041599

 Maintain the minimum clearances to enable maintenance

work on the appliance.

If the appliance is not installed in a recess, we recommend leav-

ing 400mm clearance on the right-hand side for the electrical

connection.

9.4 Wall mounting

General

164

D0000042865

 Position the installation template horizontally at the required

installation location. The installation template can be found

in the cardboard box.

 Mark the holes on the wall. Please note that the bottom two

holes are only required in combination with the ASL-HM.

 Drill the holes.

 Insert suitable rawl plugs into the holes.

 Turn the double ended screws into the rawl plugs.

HM(S) | HM(S) Trend without ASL-HM

D0000041461

 Place the appliance onto the double ended screws, followed

by the washers provided. Secure the appliance with the cor-

responding nuts.

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INSTALLATION

Installation

HM(S) | HM(S) Trend with ASL-HM

First mount the ASL-HM connector block on the wall.

D0000041460

1

2

3

1 Appliance

2 Connector block

3 Gaskets

 Place the connector block onto the double ended screws, fol-

lowed by the washers provided. Secure the connector block

with the corresponding nuts.

 Place the appliance onto the double ended screws, followed

by the washers provided. Secure the appliance with the cor-

responding nuts.

 Connect the appliance to the connector block. Do not forget

the gaskets.

9.5 Hydraulic connection

!

Material losses

The heating system to which the appliance is connected

must be installed by a qualiﬁed contractor in accordance

with the water installation drawings that are part of the

technical guides.

!

Material losses

For appliances with connector block or when ﬁtting ad-

ditional shut-off devices, install a further safety valve in

an accessible location on the heat generator itself or in

the ﬂow line in close proximity to the heat generator.

There must be no shut-off valve between the heat gen-

erator and the safety valve.

D0000059862

1

2

1 Heating ﬂow

2 Heat exchanger ﬂow

Note

If the appliance is used without a DHW cylinder, install

a tee.

 Link connections “Heating ﬂow” and “Heat exchang-

er ﬂow” with a tee.

 Insulate the pipes with insulating material. To prevent air

from entering, ensure that the pipes are sealed up to the ap-

ertures in the casing.

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INSTALLATION

Installation

9.6 Filling the system

9.6.1 General information

!

Material losses

Never switch on the power before ﬁlling the system.

!

Material losses

High ﬂow rates or water hammer can damage the ap-

pliance.

 Fill the appliance at a low ﬂow rate.

In the delivered condition, the diverter valve of the MFG is posi-

tioned at the centre, enabling the heating and DHW circuits to be

ﬁlled evenly. If power is switched on, the diverter valve automat-

ically moves into the central heating position.

If you intend ﬁlling or draining the system later, ﬁrst place the

diverter valve into its centre position.

For this, enable controller parameter DRAIN HYD in the DIAGNO-

SIS/ RELAY TEST SYSTEM menu.

9.6.2 Determine the ﬁll pressure

The diaphragm expansion vessel installed in the appliance has a

volume of 24 litres. The pre-charge pressure P0 is 1.5 bar.

If the height difference ∆h between the highest point of the heat-

ing system and the diaphragm expansion vessel is no more than

13 m, the diaphragm expansion vessel can be used without any

changes being required.

 Fill the heating system at a pressure of at least 1.8 bar (P0

+ 0.3 bar). Observe the safety valve’s response pressure of 3

bar.

If the height difference between the highest point of the heating

system and the diaphragm expansion vessel is more than 13 m,

the pre-charge pressure needs to be adapted.

 Calculate the pre-charge pressure:

P0 =

∆h

10

+ 0,2 bar

D0000081230

 Note that the heating system ﬁll pressure increases

accordingly.

 Check whether a further external diaphragm expansion ves-

sel needs to be installed.

 Fill the heating system at the appropriate pressure (P0 + 0.3

bar). Observe the safety valve’s response pressure of 3 bar.

9.7 Venting the appliance

Multifunction assembly (MFG)

D0000041463

1

1 Air vent valve

 Vent the pipework by pulling up the red cap on the air vent

valve.

 Close the air vent valve after the venting process.

9.7.1 HM(S) | HM(S) Trend with ASL-HM

Heating circuit

D0000041462

1

1 Air vent valve

 Vent the heating circuit at the ASL-HM connector block.

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INSTALLATION

Power supply

9.8 Safety valve

D0000042471

1

3

2

1 Drain hose

2 Fixing

3 Drain

 Size the discharge outlet so that water can drain off unim-

peded when the safety valve is fully opened.

 Ensure that the drain hose of the safety valve is open to the

outside.

 Install the drain hose of the safety valve with a constant fall

to the drain. When installing the drain, never kink the drain

hose.

 Secure the drain hose by suitable means, to prevent any hose

movement in the event of water being discharged.

10. Power supply

WARNING Electrocution

Carry out all electrical connection and installation work

in accordance with national and regional regulations.

WARNING Electrocution

The connection to the power supply must be in the form

of a permanent connection. Ensure the appliance can

be separated from the power supply by an isolator that

disconnects all poles with at least 3mm contact separa-

tion. This requirement can be met with contactors, circuit

breakers, fuses/MCBs, etc.

WARNING Electrocution

 Before working on the appliance, isolate it from the

power supply at the control panel.

Note

The speciﬁed voltage must match the mains voltage. Ob-

serve the type plate.

Note

Observe the operating and installation instructions of the

heat pump manager and the heat pump.

The connection must only be carried out by a qualiﬁed contractor

and in accordance with these instructions.

 Use cables with the relevant cross-sections. Observe the ap-

plicable national and regional regulations.

MCB/fuse

rating

Assignment Cable cross-section

B 16 A

Electric emergency/

booster heater

(DHC)

Three-phase

2.5 mm² for routing through a wall.

1.5 mm² with only two live cores and

routing on a wall or in an electrical con-

duit on a wall.

B 16 A

Electric emergency/

booster heater

(DHC)

1 phase

2.5 mm² for routing through a wall.

1.5 mm² when routing multi-core cables

on a wall or in an electrical conduit on

a wall.

B 16 A Control 1.5 mm²

Electrical data is provided in chapter "Speciﬁcation / Data table".

!

Material losses

Provide separate fuses/MCBs for the two power circuits,

i.e. for the compressor and the electricemergency/boost-

er heater circuits.

Route the electrical cables into the appliance from below, along

the channel provided.

 Then route the electrical cables through the strain relief

ﬁttings.

 Check the function of the strain relief ﬁttings.

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INSTALLATION

Power supply

10.1 Electric emergency/booster heater

General

Appliance

function

Effect of the electric emergency/booster heater

Mono energetic

operation

If the heat pump undershoots the dual mode point, the elec-

tric emergency/booster heater safeguards both the heating

operation and the delivery of high DHW temperatures.

Emergency

mode

Should the heat pump suffer a fault that prevents its contin-

ued operation, the heating output will be covered by the elec-

tric emergency/booster heater.

Electrical connection 3 phase HM | HM Trend

D0000041479

XD02 Electric emergency/booster heater (DHC)

L1, L2, L3, N, PE

Connected load Terminal assignment

2.9 kW L1 N PE

5.9 kW L1 L2 N PE

8.8 kW L1 L2 L3 N PE

Power connection 1 phase only HM (S) | HM (S) Trend

1

2

1

2

D0000041480

XD02 Electric emergency/booster heater (DHC)

L1, L2, N1, N2, PE

Connected load Terminal assignment

2.9 kW L1 N1 PE

2.9 kW L2 N2 PE

5.9 kW L1 L2 N1 N2 PE

10.2 Control voltage

D0000041478

XD1.1 Power supply (Netz)

L, 2, N, PE

XD1.2 Power supply utility (EVU)

L, L'

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INSTALLATION

Power supply

10.3 WPM heat pump manager

WARNING Electrocution

Only components that operate with safety extra low

voltage (SELV) and that ensure secure separation from

the mains voltage supply may be connected to the low

voltage terminals of the appliance.

Connecting other components can make parts of the ap-

pliance and connected components live.

 Only use components which have been approved by

us.

X2.2 X2.3 X2.4 X2.5 X2.6 X2.7 X2.8 X2.9 X2.10 X2.11 X2.12 X2.13 X2.14 X2.15

X1.1

CAN A

X1.19

CAN A

X1.18

CAN B

X1.17X1.16X1.15X1.14X1.13X1.12X1.2

CAN B

X1.3 X1.4 X1.5 X1.6 X1.7 X1.8 X1.9 X1.10X1.11

X2.1

D0000071841

Safety extra low voltage

X1.1

CAN A

+

-

L

H

+

-

L

H

CAN (connection for heat pump and WPE heat

pump extension)

X1.2

CAN B

+

-

L

H

+

-

L

H

CAN (connection for FET remote control and

ISG Internet Service Gateway)

X1.3 Signal

Earth

1

2

Outside temperature sensor

X1.4 Signal

Earth

1

2

Buffer sensor (heating circuit sensor 1)

X1.5 Signal

Earth

1

2

Flow sensor

X1.6 Signal

Earth

1

2

Heating circuit sensor 2

X1.7 Signal

Earth

1

2

Heating circuit sensor 3

X1.8 Signal

Earth

1

2

DHW cylinder sensor

X1.9 Signal

Earth

1

2

Source sensor

X1.10 Signal

Earth

1

2

2nd heat generator (2.WE)

X1.11 Signal

Earth

1

2

Cooling flow

X1.12 Signal

Earth

1

2

DHW circulation sensor

X1.13

Signal

Earth

Signal

1

2

3

FE7 remote control/ telephone remote

switch/ heating curve optimisation/ SGReady

X1.14

Constant 12V

Input

GND

+

IN

Analogue input 0-10V

X1.15

Constant 12V

Input

GND

+

IN

Analogue input 0-10V

X1.16 Signal

Earth

1

2

PWM output 1

X1.17 Signal

Earth

1

2

PWM output 2

Safety extra low voltage

X1.18

CAN B

+

-

L

H

+

-

L

H

CAN (connection for FET remote control and

ISG Internet Service Gateway)

X1.19

CAN A

+

-

L

H

+

-

L

H

CAN (connection for heat pump and WPE heat

pump extension)

Mains voltage

X2.1

L

N

PE

L

N

Power supply

X2.2

L' (power supply

utility input)

L* (pumps L)

L'

L* (pumps L)

L' (power supply utility input)

L* (pumps L)

X2.3

L

N

PE

L

N

PE

Heating circuit pump 1

X2.4

L

N

PE

L

N

PE

Heating circuit pump 2

X2.5

L

N

PE

L

N

PE

Heating circuit pump 3

X2.6

L

N

PE

L

N

PE

Buffer charging pump 1

X2.7

L

N

PE

L

N

PE

Buffer charging pump 2

X2.8

L

N

PE

L

N

PE

DHW charging pump

X2.9

L

N

PE

L

N

PE

Source pump/ defrost

X2.10

L

N

PE

L

N

PE

Fault output

X2.11

L

N

PE

L

N

PE

DHW circulation pump/ 2nd heat

source DHW

X2.12

L

N

PE

L

N

PE

2ndheat source heating

X2.13

L

N

PE

L

N

PE

Cooling

X2.14

Mixer OPEN

N

PE

Mixer CLOSE

5

N

PE

6

Mixer, heating circuit 2

( X2.14.1 Mixer OPEN

X2.14.2 Mixer CLOSE )

X2.15

Mixer OPEN

N

PE

Mixer CLOSE

5

N

PE

6

Mixer, heating circuit 3

( X2.15.1 Mixer OPEN

X2.15.2 Mixer CLOSE )

Note

For every appliance fault, output X2.10 issues a 230V

signal.

In the case of temporary faults, the output switches the

signal through for a speciﬁc time.

In the case of faults that result in a permanent appliance

shutdown, the output switches through permanently.

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INSTALLATION

Power supply

10.4 Sensor installation

10.4.1 Return temperature measuring

 Connect an additional return sensor in combination with the

following heat pump types:

- HPA-O 3-8 CS Plus (only in combination with a buffer

cylinder)

- HPA-O 7-13 (C)(S) Premium (only in combination with a buff-

er cylinder)

- WPL 13 E/cool

- WPL 18 E/cool

- WPL 15-25 A(C)(S) (only in combination with a buffer

cylinder)

- WPL 07-17 ACS classic (only in combination with a buffer

cylinder)

- WPL 19-24 I, A (only in combination with a buffer cylinder)

Note

 For heat metering with the WPL 07-17 ACS classic/

HPA-O 3-8 CS Plus in conjunction with the HM(S)

(Trend) hydraulic module, observe the section “Heat

metering with the WPL 07-17 ACS classic / HPA-O 3-8

CS Plus”.

For systems without a buffer cylinder

 Fit the sensor in the heating circuit return as a contact sensor

and if necessary, downstream of any overﬂow valve installed.

For systems with a buffer cylinder

 Fit the sensor as a return temperature sensor in the buffer

cylinder.

Installation:

The electrical connection is made at terminal X1.4.

 When installing a sensor, observe the commissioning in-

structions for the heat pump manager (see chapter “Connect-

ing external components”).

10.4.2 Heat metering with the WPL 07-17 ACS classic / HPA-O

3-8 CS Plus

Note

 Install the following immersion sensor for the heat

pump, in addition to the sensor described in chapter

“Return temperature measuring”.

 Use the immersion sensor connected to terminal X61 for heat

metering.

D0000067540

 If required, extend the sensor lead. Use a cable with a mini-

mum diameter of 0.34mm².

D0000067541

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INSTALLATION

Power supply

If no ASL-HM connector block is used:

D0000069971

1

1 Immersion sensor

 Solder the sensor well provided onto the common return

from the DHW and heating system in the building to the heat

pump.

 Insert the immersion sensor into the sensor well.

 Insulate the pipe in accordance with national and regional

regulations.

If an ASL-HM connector block is used:

 Insert the immersion sensor into the sensor well preﬁtted in

the ASL-HM.

10.4.3 TAF PT immersion/contact sensor

 When installing a sensor, observe the commissioning in-

structions for the heat pump manager (see chapter “Connect-

ing external components”).

10.4.4 Outside temperature sensor AFPT

 When installing a sensor, observe the commissioning in-

structions for the heat pump manager (see chapter “Connect-

ing external components”).

10.5 Connecting external components

 When installing external components, observe the commis-

sioning instructions for the heat pump manager (see chapter

“Connecting external components”).

10.6 Fitting the appliance cap

 Fit the appliance cap in reverse order to the instructions pro-

vided in chapter “Removing the appliance cap”.

Cable with connector

D0000041465

2

1

1 Connection

2 Connector from the programming unit

 Fit the connector from the programming unit in the control

panel.

!

Material losses

Take care not to pinch the power cable of the program-

ming unit when ﬁtting the appliance cover.

 Arrange the power cable in a loop again and secure

it with the multi-use cable tie provided.

14 | HM (S)| HM(S) Trend www.stiebel-eltron.com

INSTALLATION

Commissioning

11. Commissioning

!

Material losses

To prevent the temperature falling below the dew point,

the casing must be closed during operation and undam-

aged.

A contractor must commission the appliance, make all the set-

tings at the commissioning level of the heat pump manager, and

instruct the user.

Commissioning must be carried out in accordance with these op-

erating and installation instructions and the operating and instal-

lation instructions of all components belonging to the heat pump

system. Our customer support can assist with commissioning,

which is a chargeable service.

A heat pump system can comprise many different components.

A sound knowledge of the system function is therefore essential.

Where this appliance is intended for commercial use, the rules of

the relevant Health & Safety at Work Act may be applied during

commissioning. For further details, check with your local super-

visory body; in Germany for example, this is theTÜV.

11.1 Check before commissioning the heat pump

manager

!

Material losses

When removing the appliance cap, pull the connection

plug of the programming unit out of the control panel.

D0000041465

2

1

1 Connection

2 Connector from the programming unit

!

Material losses

Take care not to pinch the power cable of the program-

ming unit when ﬁtting the appliance cap.

 Arrange the power cable in a loop and secure it with

the multi-use cable tie provided.

!

Material losses

Observe the maximum system temperature in underﬂoor

heating systems.

 Check whether the heating system is charged to the correct

pressure.

 Have you closed the air vent valve of the multi-function as-

sembly (MFG) again after venting?

 Have you placed and connected the outside temperature sen-

sor and the return sensor correctly?

 Check whether further sensors are correctly positioned and

connected.

 Check whether the power supply is connected correctly.

 Check whether the signal cable to the heat pump (bus cable)

is correctly connected.

11.1.1 High limit safety cut-out

At ambient temperatures below -15 °C the high limit safety cut-out

of the multi-function assembly may respond.

 Check whether the high limit safety cut-out has tripped.

D0000041470

 Reset the high limit safety cut-out by pressing the reset

button.

11.2 Appliance handover

Explain the function of the appliance to users and familiarise them

with its operation.

Note

Hand over these operating and installation instructions

to the user for safe-keeping. Always carefully observe all

information in these instructions. They provide informa-

tion on safety, operation, installation and maintenance

of the appliance.

www.stiebel-eltron.com HM (S)| HM(S) Trend | 15

INSTALLATION

Troubleshooting

12. Troubleshooting

WARNING Electrocution

 Isolate the appliance from the power supply when

carrying out any work.

!

Material losses

When removing the appliance cap, pull the connection

plug of the programming unit out of the control panel.

Proceed as follows:

 Pull the appliance cap forward by approx. 5cm.

 Pull off the connector.

 Remove the appliance cover.

D0000041465

2

1

1 Connection

2 Connector from the programming unit

!

Material losses

Take care not to pinch the power cable of the program-

ming unit when ﬁtting the appliance cover.

 Arrange the power cable in a loop again and secure

it with the multi-use cable tie provided.

12.1 Resetting the high limit safety cut-out

If the heating water temperature exceeds 90°C, the electric emer-

gency/booster heater shuts down.

D0000041470

 Remove the cause of the fault.

 Reset the high limit safety cut-out by pressing the reset but-

ton. To do so, use a pointed object.

 Check whether the heating water is being circulated at a suf-

ﬁciently high ﬂow rate.

13. Maintenance

We recommend a regular inspection (to establish the current con-

dition of the system), and maintenance if required (to return the

system to its original condition).

16 | HM (S)| HM(S) Trend www.stiebel-eltron.com

INSTALLATION

Specication

14. Speciﬁcation

14.1 Dimensions and connections

HM(S) | HM(S) Trend without ASL-HM

896

588

81

251

422

337

95

25

405

c12

d01

e01

d29

b01

D0000041455

b01 Entry electrical cables

c12 Safety valve drain

d01 Heat pump flow Female thread G 1

d29 Heat exchanger flow Female thread G 1

e01 Heating flow Female thread G 1

HM(S) | HM(S) Trend with ASL-HM

1131

846

25

95

405

215

590

78

163

248

333

418

503

c12

d01

e02

d30

d02

e01

d29

b01

D0000041456

b01 Entry electrical cables

c12 Safety valve drain

d01 Heat pump flow Diameter mm 28

d02 Heat pump return Diameter mm 28

d29 Heat exchanger flow Diameter mm 28

d30 Heat exchanger return Diameter mm 28

e01 Heating flow Diameter mm 28

e02 Heating return Diameter mm 28

www.stiebel-eltron.com HM (S)| HM(S) Trend | 17

INSTALLATION

Specication

18 | HM (S)| HM(S) Trend www.stiebel-eltron.com

INSTALLATION

Specication

14.2 Wiring diagram HM | HM Trend

M

1~

1 2 3 4 5 6

p

+SV

GND

OUT

421

Hz

T2

T1

+SV

GND

OUT

PT 1000

XD02 XD01.1 XD01.2

MA14

MA15

BP10

BF01

BT02

BT01

NETZ EVUDHC (MFG)

XD80

1

2

3

4

2

3

2

3

4

5

6

X72

X71

X70

X69

X68

X67

X66

X65

X64

X63

X62

X61

X60

AA07 (MFG)

KF22 KF21 KF20

MFG

BT55

X59

AA07

<T

11

12

21

22 32

31

1

3

1

3

KF20

KF21

KF22

EB01

PWM

GND

134

M

1~

ws (PWM)

br (GND)

N

L

N

PE

L'

L*

PE

X2.15

X2.14

X2.13

X2.12

X2.11

X2.10

X2.9

X2.8

X2.7

X2.6

X2.5

X2.4

X2.3

X2.2

X2.1

+

-

L

H

1

2

3

+

IN

1

2

+

-

L

H

X1.17

X1.16

X1.15

X1.14

X1.13

X1.12

X1.11

X1.10

X1.9

X1.8

X1.7

X1.6

X1.5

X1.4

X1.3

AA01 (WPM4)

X1.19

X1.18

CAN B

CAN A

X1.1

X1.2

CAN A

CAN B

L

N

AA06

1234

X27

1=

2=

3=

4=

+12V

H

L

L1L2L3N

N L1 L2 L3 NL 2 L L´

D0000081112

www.stiebel-eltron.com HM (S)| HM(S) Trend | 19

INSTALLATION

Specication

AA01 WPM heat pump manager

AA06 Programming unit

AA07 PCB, booster heater MFG

EB01 Booster heater MFG

BF01 Flow rate and temperature, heating circuit

BP10 Pressure sensor, heating circuit

BT01 Temperature sensor, heat pump ﬂow

BT02 Temperature sensor, heat pump return

BT55 High limit safety cut-out MFG (manual reset)

MA14 Motor, buffer charging pump (PWM/1-10V)

MA15 Motor, diverter valve, heating/DHW

KF20 Relay, booster heater MFG

KF21 Relay, booster heater MFG

KF22 Relay, booster heater MFG

XD01.1 Terminal, power supply

XD01.2 Terminal, power-OFF contact

XD02 Terminal, MFG power supply

XD80 Plug-in connector (CAN bus)

AA01 extra low voltage

AA01-X1.1 Connector, CAN A (WP connection)

AA01-X1.2 Connector, CAN B (FET/ISG connection)

AA01-X1.3 Connector, outside temperature sensor

AA01-X1.4 Connector, buffer temperature sensor BT06

AA01-X1.5 Connector, ﬂow temperature sensor

AA01-X1.6 Connector, heating circuit temperature sensor 2

AA01-X1.7 Connector, heating circuit temperature sensor 3

AA01-X1.8 Connector, DHW cylinder sensor BT20

AA01-X1.9 Connector, source sensor

AA01-X1.10 Connector, heat source 2

AA01-X1.11 Connector, ﬂow, cooling

AA01-X1.12 Connector, DHW circulation sensor

AA01-X1.13 Connector, remote control FE7

AA01-X1.14 Connector, analogue input 0-10V

AA01-X1.15 Connector, analogue input 0-10V

AA01-X1.16 Connector, PWM output 1

AA01-X1.17 Connector, PWM output 2

AA01-X1.18 Connector, CAN B (FET/ISG connection)

AA01-X1.19 Connector, CAN A (MFG)

AA01 Control voltage

AA01-X2.1 Connector, power supply

AA01-X2.2 Connector, power-OFF contact

AA01-X2.3 Connector, heating circuit pump 1

AA01-X2.4 Connector, heating circuit pump 2

AA01-X2.5 Connector, heating circuit pump 3

AA01-X2.6 Connector, buffer charging pump 1

AA01-X2.7 Connector, buffer charging pump 2

AA01-X2.8 Connector, DHW charging pump

AA01-X2.9 Connector, source pump/defrost

AA01-X2.10 Connector, fault output

AA01-X2.11 Connector, DHW circulation pump/ HS2 – DHW

AA01-X2.12 Connector, HS2 – heating

AA01-X2.13 Connector, cooling

AA01-X2.14 Connector, mixer, heating circuit 2 (X2.14.1 Mixer

OPEN/X2.14.2 Mixer CLOSE)

AA01-X2.15 Connector, mixer, heating circuit 3 (X2.15.1 Mixer

OPEN/X2.15.2 Mixer CLOSE)

AA06-X27 Terminal, programming unit

AA07-X60 Connector, temperature sensor, heat pump ﬂow

BT01

AA07-X61 Connector, temperature sensor, heat pump re-

turn BT02

AA07-X62 Not assigned – connector, temperature sensor,

heat pump return

AA07-X63 Not assigned – connector, temperature sensor,

DHW cylinder, internal

AA07-X64 Connector, temperature and ﬂow rate, heating

circuit, BF01

AA07-X65 Not assigned

AA07-X66 Rast 2.5 connector (heating system pressure)

BP01

AA07-X67 Not assigned

AA07-X68 Connector, switching, motor, diverter valve cen-

tral heating / DHW

AA07-X69 Not assigned

AA07-X70 Connector, switching, pump, heating circuit PW-

M/1-10V

AA07-X71 Not assigned

AA07-X72 Connector, CAN bus

EB01-X59 Terminal, MFG

20 | HM (S)| HM(S) Trend www.stiebel-eltron.com

INSTALLATION

Specication

14.3 Wiring diagram HMS | HMS Trend

M

1~

1 2 3 4 5 6

p

+SV

GND

OUT

421

Hz

T2

T1

+SV

GND

OUT

PT 1000

XD02 XD01.1 XD01.2

MA14

MA15

BP10

BF01

BT02

BT01

NETZ EVUDHC (MFG)

XD80

1

2

3

4

2

3

2

3

4

5

6

X72

X71

X70

X69

X68

X67

X66

X65

X64

X63

X62

X61

X60

AA07 (MFG)

KF22 KF21 KF20

EB01

MFG

BT55

X59

AA07

<T

11

12

21

22 32

31

1

3

1

3

KF20

KF21

KF22

PWM

GND

3 14

M

1~

ws (PWM)

br (GND)

N

L

N

PE

L'

L*

PE

X2.15

X2.14

X2.13

X2.12

X2.11

X2.10

X2.9

X2.8

X2.7

X2.6

X2.5

X2.4

X2.3

X2.2

X2.1

+

-

L

H

1

2

3

+

IN

1

2

+

-

L

H

X1.17

X1.16

X1.15

X1.14

X1.13

X1.12

X1.11

X1.10

X1.9

X1.8

X1.7

X1.6

X1.5

X1.4

X1.3

AA01 (WPM4)

X1.19

X1.18

CAN B

CAN A

X1.1

X1.2

CAN A

CAN B

L

N

AA06

1234

X27

N

1

N

2

L

1

L

2

Zusatz-BHZ

(im MFG 5 nicht verbaut!)

1=

2=

3=

4=

+12V

H

L

L 2 N L L´

LN N L

D0000081112

Emergency/booster heater

(not installed in the MFG 5)

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